Wall extrusion



FIG. 1 is a cross-sectional view of the broken central rear end of the wall extrusion in FIG. 2.

FIG. 2 is a perspective view of the broken central rear end of the wall extrusion broken in the center indicating in definite length.

FIG. 3 is a side elevational view of the wall extrusion; and,

FIG. 4 is a top plan view of the wall extrusion. 

The ornamental design for the “wall extrusion,” as shown and described. 